Page 1
Operation, Parts, Service, Repair
GX-7A, GX-7 DI, and GX-7 400
311321H
Spray Guns
For use with non-flammable polyurethane foams, two-component coating systems
(polyureas), and some two-component epoxy systems. For professional use only.
Not for use in explosive atmospheres.
See page 2 for model information.
ENG
3500 psi (24 MPa, 240 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions
in this manual. Save these instructions.
GX-7A
2!
GX-7 400
GX-7 DI
Page 2
Models
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Overall View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Centerline Components . . . . . . . . . . . . . . . . . . . 8
Mixing Module . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation Basics . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Isocyanate Hazard . . . . . . . . . . . . . . . . . . . . . . 11
Keep A and B Components Separate . . . . . . . . 11
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Safety Position . . . . . . . . . . . . . . . . . . . . . . . . . 11
Air Hose Connection . . . . . . . . . . . . . . . . . . . . . 12
Coupling Block . . . . . . . . . . . . . . . . . . . . . . . . . 13
Air Inlet Configuration . . . . . . . . . . . . . . . . . . . . 14
Mixing Module and PCD Installation . . . . . . . . . 15
Valving Rod Adjustment . . . . . . . . . . . . . . . . . . 16
Valving Rod Adjustment . . . . . . . . . . . . . . . . . . 16
Initial Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Daily Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Daily Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . 18
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Gun Service Kits . . . . . . . . . . . . . . . . . . . . . . . . 20
Clean Spray Gun Procedure . . . . . . . . . . . . . . . 20
Flush Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Service Screen Screw . . . . . . . . . . . . . . . . . . . . 22
Remove Centerline Components . . . . . . . . . . . 22
Install Centerline Components . . . . . . . . . . . . . 24
Replace End Cap and Air Piston Assembly . . . 25
Replace Trigger Valve O-Rings . . . . . . . . . . . . . 26
Clean Mixing Module . . . . . . . . . . . . . . . . . . . . . 27
Install Mixing Module . . . . . . . . . . . . . . . . . . . . . 28
Clean Pattern Control Disc . . . . . . . . . . . . . . . . 29
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
GX-7A Model Final Assembly . . . . . . . . . . . . . . 30
GX-7 DI Model Final Assembly (295541) . . . . . 32
GX-7 400 Model Final Assembly (295540) . . . . 34
GX-7A Model Handle Assembly (295810) . . . . . 36
GX-7 DI Model Handle Assembly (295809) . . . 38
GX-7 400 Model Handle Assembly (295799) . . 40
Coupling Block Assembly (295383) . . . . . . . . . . 42
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
GX-7A Mix Module Kit . . . . . . . . . . . . . . . . . . . . 43
Set-Up Chart for GX-7A Model . . . . . . . . . . . . . 44
GX-7 400 Mix Module Kit . . . . . . . . . . . . . . . . . . 45
Set-up Chart for GX-7 400 Model . . . . . . . . . . . 46
GX-7 DI Model Specifications . . . . . . . . . . . . . . 47
Tip Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Tool Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 50
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 50
Models
.
Part No. Description
295540 GX-7 400 296859 (451)
295541 GX-7 DI - 4/213 296901 (4)
295542 GX-7A - 1/90 296909 (1)
295543 GX-7A - 10/210 296906 (10)
295544 GX-7A - 3/70 296226 (3)
295545 GX-7A - 5/70 296923 (5)
2 311321H
Includes:
Mix Module Tip
296853 (212)
296706 (213)
296712 (90)
296704 (210)
296710 (70)
296710 (70)
Page 3
Warnings
Warnings
The following general warnings are for the setup, use, grounding, maintenance, and repair of this
equipment. Additional, more specific warnings may be found throughout the body of this manual
where applicable. Symbols appearing in the body of the manual refer to these general warnings.
When these symbols appear throughout the manual, refer back to these pages for a description
of the specific hazard.
WARNING
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the
operating area of the equipment to help protect you from serious injury, including eye injury,
inhalation of toxic fumes, burns, and hearing loss. This equipment includes but is not limited to:
• Protective eyewear
• Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
• Hearing protection
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin,
inhaled, or swallowed.
• Read MSDS’s to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable
guidelines.
SKIN INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may
look like just a cut, but it is a serious injury that can result in amputation. Get immediate
surgical treatment.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
•Follow Pressure Relief Procedure in this manual, when you stop spraying and before
cleaning, checking, or servicing equipment.
311321H 3
Page 4
Warnings
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To
help prevent fire and explosion:
• Use equipment only in well ventilated area.
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and
plastic drop cloths (potential static arc).
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable
fumes are present.
• Ground all equipment in the work area. See Grounding instructions.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail.
• If there is static sparking or you feel a shock, stop operation immediately. Do not use
equipment until you identify and correct the problem.
• Keep a fire extinguisher in the work area.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated
system component. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Data in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information about your material, request MSDS forms from distributor or retailer.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
Graco/Gusmer replacement parts only.
• Do not alter or modify equipment.
• Use equipment only for its intended purpose. Call your Graco/Gusmer distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
PRESSURIZED EQUIPMENT HAZARD
Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the eyes or on
skin and cause serious injury.
•Follow Pressure Relief Procedure in this manual, when you stop spraying and before
cleaning, checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
4 311321H
Page 5
Warnings
WARNING
PRESSURIZED ALUMINUM PARTS HAZARD
Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents
or fluids containing such solvents in pressurized aluminum equipment. Such use can cause
serious chemical reaction and equipment rupture, and result in death, serious injury, and property damage.
311321H 5
Page 6
Overall View
2 !
Overall View
Model GX-7A
Gun Block
Manual Valves
FIG. 1: GX-7A Overall View
Forward Stop
Locknut
Valving Rod Rear Stop
Air Cap Adjustment Valve
Valving Rod Forward Stop
Rear Packing Nut
Tr ig ge r
Model GX-7 DI
IG. 2: GX-7 DI Overall View
F
6 311321H
Page 7
Overall View
Model GX-7 400
Gun Block
Trigger
FIG. 3: GX-7 400 Overall View
Forward Stop
Locknut
Valving Rod
Rear Stop
2
!
Air Cap Valve
Valving Rod
Forward Stop
Rear Packing Nut
311321H 7
Page 8
Overall View
Centerline Components
Model GX-7A
Packing
Nut
Rear Packing
Retainer
Screen
Screen
Screw Seal
R-Screen Screw
Valving Rod
Rear Packing
Check Valve
Assembly
FIG. 4: GX-7A Centerline Components
Gun Block
Coupling Block
Gasket
A-Screen Screw
Check Valve
Front Packing
Pattern Control
Disc (PCD)
Mixing
Module
PCD Retainer
Screen
Screw
Seal
Screen
PCD Body
O-ring
Air Cap
Model GX-7 DI
Check Valve
Mixing Module
Mixing Module
Retainer
PCD
Retainer
Air Cap
IG. 5: GX-7 DI Centerline Components
F
R-Screen Screw
Pattern Control
Disc (PCD)
Screen
Gun Block
Rear Seal Gland
Rear Packing
Coupling Block
Gasket
Coupling Block
Mounting Screw
Rear Seal Retainer
Assembly
Check Valve
Screen
A-Screen
Screw
8 311321H
Page 9
Model GX-7 400
Overall View
R-Screen Screw
Screen
Screw Seal
Check Valve
Mixing Module
Pattern Control
Disc (PCD)
Air Cap
Spring
PCD Retainer
Coupling Block
Gasket
Coupling Block
Mounting Screw
Rear Packing
Retainer
Gun Block
Rear Packing
Valving Rod
Rear Seal Retainer
Check Valve
Screen
Screen Screw Seal
A-Screen Screw
FIG. 6: GX-7 400 Centerline Components
311321H 9
Page 10
Overall View
Mixing Module
All gun models employ the concept of impingement mixing through the use of a single-part
MIXING MODULE. This system is cleaned by
a mechanical self-cleaning process, eliminating the need for solvent or air purging between
dispenses.
The gun can be assembled with two styles of
mixing components; their selection is dependent upon the type of system sprayed. The
Set-Up Charts on pages 44 and 46 show several of the more common sets of these configurations.
The Mixing Module, in combination with a Pattern Control Disc (PCD), produce a thoroughly
mixed chemical and reliable spray patterns.
The module can be set up to spray at its maximum rated output. Additionally, by changing to
a smaller PCD the module can spray at the low
outputs and pressures that are required for
detail work.
.
Valving Rod
Mixing Module (round or flat)
PCD (round or flat)
FIG. 8: GX-7 400 Mixing Module
.
Valving Rod
Mixing Module (round or flat)
Valving
Rod
Mixing Module
(round or flat)
FIG. 7: GX-7A Mixing Module
PCD (round or flat)
PCD (round or flat)
FIG. 9: GX-7 DI Mixing Module
10 311321H
Page 11
Operation Basics
To prevent accidental gun operation, always
disconnect air supply before servicing gun or
anytime gun is not in use.
Isocyanate Hazard
Spraying materials containing isocyanates
creates potentially harmful mists, vapors,
and atomized particulates.
Read material manufacturer’s warnings and
material MSDS to know specific hazards
and precautions related to isocyanates.
Prevent inhalation of isocyanate mists,
vapors, and atomized particulates by providing sufficient ventilation in the work area. If
sufficient ventilation is not available, a supplied-air respirator is required for everyone in
the work area.
To prevent contact with isocyanates, appropriate personal protective equipment, including chemically impermeable gloves, boots,
aprons, and goggles, is also required for
everyone in the work area.
Operation Basics
Grounding
Check your local electrical code and proportioner manual for detailed grounding instructions.
Ground the spray gun through connection to a
Graco-approved grounded fluid supply hose.
Safety Position
The guns have a two-position valving rod rear
stop. The SERVICE position allows for minimal
rearward travel of valving rod but will not allow
chemical to discharge. The OPEN position
allows full rearward travel of valving rod and
permits gun to dispense. Whenever gun is not
spraying, set to SERVICE position.
Engage Safety Stop
To engage safety stop, push in and turn safety
stop clockwise to place gun in CLOSED (SERVICE) position.
Keep A and B Components
Separate
CAUTION
To prevent cross-contamination of the gun’s
wetted parts, do not interchange A component (isocyanate) and B component (resin)
parts. The gun is shipped with the A side on
the left.
311321H 11
CLOSED (SERVICE)
When not spraying in
safety position.
FIG. 10: Safety Stop - Closed
Page 12
Operation Basics
Disengage Safety Stop
To disengage safety stop, push in and turn
safety stop counterclockwise to place gun in
OPEN position (red band is exposed).
Red Band
OPEN
Red band exposed
when spraying.
FIG. 11: Safety Stop - Open
Close Manual Valves
Air Hose Connection
Connect Air Hoses
Pull back sleeve of female fitting, insert male
fitting and slide sleeve forward to secure connection.
Disconnect Air Hoses
Pull back sleeve of female fitting and pull out
male fitting.
Pull Sleeve
Closing manual valves prevents chemicals in
heated hoses from entering gun. For your own
safety, close manuals valves before servicing
gun.
Manual Valves rotate clockwise to
close.
FIG. 12: Close Manual Valves
FIG. 13: Disconnect Air Hose
12 311321H
Page 13
Operation Basics
Coupling Block
Chemical hoses are joined to gun block by
coupling block to ease installation and removal
of gun.
Manual Valves
Two manual valves located on coupling block
control flow of each chemical component to
gun.
Triggering gun with manual valves closed
may cause crossover if any residual chemical remains in gun ports.
Never open manual valve unless coupling
block is secured to gun or unless you point
gun into waste container.
Close Manual Valves
Use 5/16 in. nut driver to turn manual valve
fully clockwise.
CAUTION
To prevent accidental gun operation, always
set safety stop to CLOSED (SERVICE),
close both manual valves, and disconnect air
supply.
Installation and Removal
To prevent release of pressurized chemicals,
close both manual valves before removing
coupling block.
Install Coupling Block
1. Replace nicked, damaged, or worn coupling block gaskets.
Open Manual Valves
Use 5/16 in. nut driver to turn manual valve
counterclockwise three full turns.
Coupling
Block
Manual Valves
FIG. 14: Open Manual Valves
2. With gaskets in place, fit coupling block to
gun block.
311321H 13
Page 14
Operation Basics
3. Insert coupling block mounting screw and
use 5/16 in. nut driver to tighten to gun
block.
Coupling Block
Gaskets
Coupling Block
Mounting Screw
Optional Configuration
Refer to page 42. If bottom-mount hose connection is desired, alternate swivel fitting (2
and 3) with pipe plugs (1). Use pipe thread
sealant. Do not cross-over which side each fitting is on.
Air Inlet Configuration
There are two configurations for the air inlet. In
the standard configuration the air inlet is at the
base of the handle, and in the alternate configuration the air inlet is at the rear of the gun.
Pipe
Plug
FIG. 15: Install Coupling Block
Remove Coupling Block
1. Set safety stop to CLOSED (SERVICE).
2. Disconnect air hose.
3. Close both manual valves.
4. Remove coupling block mounting screw.
5. Separate coupling block from gun.
6. Wipe mating surfaces of gun block and
coupling block to remove residual chemical.
7. Cover exposed openings with grease.
Optional Pipe
Nipple
Pipe Nipple
FIG. 16: Air Inlet Configuration
To change to alternate configuration,
1. Remove pipe nipple.
2. Remove pipe plug from rear of gun.
3. Install pipe plug in location previously occupied by pipe nipple.
14 311321H
4. Install pipe nipple in location previously
occupied by pipe plug.
Page 15
Operation Basics
Mixing Module and PCD
Installation
1. Install mixing module:
a. Disconnect gun from coupling block.
b. Connect air supply to gun.
c. Set safety stop to OPEN.
d. Hold down trigger and place module
over tip of valving rod.
e. Align keying pin with hole in gun block
and push in firmly (GX-7 DI model only).
f. Install front packing into module retainer
(GX-7 model only).
f. Use wrench to loosen piston locknut.
Turn valving rod rearward as far as it will
turn.
g. Place and orient PCD over mixing mod-
ule retainer.
h. Install PCD retainer and hand tighten
(GX-7 DI model only).
i. Install PCD retainer and wrench tighten
(GX-7 model only).
3. Adjust valving rod. See procedure for
appropriate gun model.
4. Set safety stop to OPEN position.
5. Check adjustment of valving rod:
g. Install module retainer, hand tight.
Release trigger.
h. Use wrench to strongly tighten module
retainer (250 in.-lbs.).
GX-7 DI model only: use wrench to
tighten module retainer (150 in.-lbs.).
DO NOT OVERTIGHTEN.
2. Install PCD:
a. Disconnect air supply from gun.
b. Loosen forward stop screw (GX-7
model only).
c. Turn forward stop nut clockwise (as
viewed from front of gun) 1-2 turns
(GX-7 model only).
a. With air supply connected, hold down
gun trigger and loosen PCD retainer.
Release trigger.
b. Hand tighten PCD retainer.
c. While maintaining tightening torque,
trigger gun. Retainer should rotate
approximately 1/10 of turn.
d. Release trigger.
d. Slightly loosen rear seal retainer
assembly.
e. Remove safety stop.
311321H 15
Page 16
Operation Basics
Valving Rod Adjustment
GX-7A and GX-7 400 Models Only
1. Push in rear stop to SERVICE position.
2. If attached, turn both manual valves fully
clockwise to close (see Manual Valves,
page 13).
3. Connect air line from gun to air source to
pressurize air cylinder forward to CLOSED
position.
FIG. 18: One Wrench Flat
4. Loosen forward stop locknut.
Forward Stop
Locknut
Forward
Stop
FIG. 17: Forward Stop
5. Completely loosen (full CCW) forward
stop. Then slowly tighten (CW) forward
stop until a snug resistance is felt. From
this point, reverse and loosen approximately 1/16 of a turn.
6. Tighten forward stop locknut. Do not overtighten. If locknut bottoms out before resistance is felt, replace friction plug.
Valving Rod Adjustment
GX-7 DI Model Only
Valving rod requires adjustment in only the following instances:
• disassembly and service of air cylinder
• changing valving rod
• changing mixing module
1. Clean gun according to Clean Spray Gun
Procedure, page 20.
2. Connect air supply to gun.
3. Loosen rear seal retainer assembly one or
two turns.
4. Loosen locknut from valving rod three or
four turns.
5. Set safety stop to OPEN.
6. Use 5/16 in. nut driver through rear of gun
to thread valving rod forward to engage
PCD. When valving rod contacts PCD
tighten another 1/10 turn.
As a reference point, movement of one
wrench flat corresponds to 1/6 turn.
16 311321H
7. Carefully maintain position of valving rod
and tighten locknut against piston rod.
8. Retighten rear seal retainer assembly.
Page 17
Initial Set Up
1. Install female quick disconnect fitting to air
supply hose bundled with chemical supply
hoses.
2. Connect coupling block to hose bundle.
Connect A-Isocyanate hose (red-tape) to
notched fitting on coupling block. Connect
R-Resin hose (blue-tape) to fitting without
notches on coupling block.
3. Close both manual valves.
Operation Basics
5. Bleed air from chemical hoses.
a. Use separate waste containers for
A-ISO and R-Resin.
b. Hold coupling block with exit ports
pointed into waste container.
c. Open one manual valve at a time to dis-
pense into waste container.
d. Bleed each side until chemical leaving
hoses is free of air.
4. Pressurize A and R chemical hoses. Check
for leaks. See Proportioner manual.
e. Close both manual valves.
6. Use cloth soaked in gun cleaner to clean
coupling block and mating surfaces.
7. Set safety stop to CLOSED (SERVICE).
8. Install coupling block to gun.
9. Proceed with daily start-up and shutdown
procedures.
311321H 17
Page 18
Operation Basics
Daily Start-up
Ensure gun is attached to coupling block and
air hose. Ensure proportioning unit is at
desired temperature and pressure. Properly
ground equipment to avoid static sparking
that may result in fire or explosion.
1. Connect air supply to gun.
2. Adjust air cap adjustment valve. Turn knob
counterclockwise to open valve and clockwise to close valve
3. Adjust rear seal retainer.
4. Open both manual valves. See Coupling
Block section, page 13.
5. Set safety stop to OPEN.
Daily Shutdown
Follow daily shutdown procedure when
gun is out of service for any length of time,
or for mid- or end-of-day service. See
Clean Spray Gun Procedure, page 20.
1. Set safety stop to OPEN.
2. Close both manual valves.
3. Disconnect air supply from gun.
4. Shutdown proportioning unit as required.
See Proportioner manual.
5. Clean as required. See Clean Spray Gun
Procedure, page 20.
6. Test spray on disposable surface.
Do not disassemble gun daily for cleaning
if it is operating properly. However, if gun is
removed from coupling block, it must be
flushed and cleaned thoroughly.
18 311321H
Page 19
Pressure Relief Procedure
4. Release gun trigger, set safety stop to
Relieve pressure before cleaning or repairing
gun.
1. Close both manual valves.
Pressure Relief Procedure
CLOSED, and close manual valves.
If fluid in hose and proportioner is still under
pressure, follow Pressure Relief Procedure in
proportioner manual
To relieve pressure in hose after gun is
removed, place fluid manifold over containers, facing away from you. Very carefully
open fluid valves. Under high pressure, fluid
will spray sideways from fluid ports. See FIG.
21.
Manual Valves
FIG. 19: Close Manual Valves
2. Set safety stop to OPEN.
3. Trigger gun onto cardboard or into waste
container to relieve pressure.
2
!
FIG. 20: Trigger Gun
TI2484a
FIG. 21: Open Manual Valves
311321H 19
Page 20
Maintenance
Maintenance
Gun Service Kits
Use either the 1-Quart Gun Service Kit
(296980) or 3-Gallon Gun Service Kit (296981)
to perform daily flushing of spray gun without
disassembly.
FIG. 22: 1-Quart Gun Service Kit
For more information about the 1-Quart Gun
Service Kit, see Manual 311340.
FIG. 23: 3-Gallon Gun Service Kit
For more information about the 3-Gallon Gun
Service Kit, see Manual 311341.
Clean Spray Gun Procedure
To avoid static sparking that may result in fire
or explosion, ensure all equipment in cleaning
procedure is grounded. Do not clean on or
near foamed or coated surfaces or any other
flammable surfaces or objects.
Thoroughly flush gun block with gun cleaner
before removing valving rod or mixing components from gun block. Also allow chemicals in
spray gun to cool before cleaning.
This procedures makes use of the 1-Quart or
3-Gallon Gun Service Kit.
20 311321H
1. Set safety stop to CLOSED (SERVICE).
Page 21
Maintenance
2. Close both manual valves.
3. Remove gun from coupling block.
4. Attach service block of gun service kit to
spray gun, and then tighten using 5/16 in.
nut driver.
5. Pressurize Service Kit container up to 100
psi. DO NOT EXCEED 100 psi (0.7 MPa, 7
bar).
6. Open one manual valve on service block.
7. Connect air to gun. Set safety stop to
OPEN.
8. Hold gun against grounded waste container.
9. Trigger gun and 1-Quart Gun Service Kit.
Spray into waste container until there is a
fine, unobstructed mist of gun cleaner.
10.Release both triggers and close manual
valve on service block.
16.Clean screens, check valves and screen
screw as required. See Service Screen
Screw, page 22.
Inspect air cap, PCD, mixing module, and
gun block for build up of material and clean
as required.
Do not use metal cleaning devices to clean
plastic components.
Flush Gun
To avoid static sparking that may result in fire
or explosion, ensure all equipment in flushing
procedure is grounded. Do not flush on or
near foamed or coated surfaces.
1. Set safety stop to CLOSED (SERVICE).
2. Close both manual valves.
11.Repeat steps 5-7 for other side of gun.
12.After initial cleaning, remove air cap, PCD
retainer, and PCD. Flush a second time to
ensure thorough cleaning.
13.Remove service block of gun service kit
from spray gun.
14.Set safety to CLOSED (SERVICE).
15.Disconnect air supply.
3. Loosen R-Screen screw and then remove
by hand.
4. Use flush can to thoroughly flush screen
screw and screen screw cavity.
5. Loosen A-Screen screw and then remove
by hand.
6. Use flush can to thoroughly flush screen
screw and screen screw cavity.
7. Service gun by following Maintenance procedures, page 20.
311321H 21
Page 22
Repair
Repair
Remove Centerline
Components
Shutdown proportioner and allow chemicals
to cool before servicing gun.
Clean A and R components in separate containers to avoid cross contamination.
Service Screen Screw
1. Flush gun according to Clean Spray Gun
Procedure, page 20.
2. Unthread screen screw from gun block.
3. Remove check valve from screen screw.
Clean valve with gun cleaner and inspect
for damage. Replace if necessary.
4. Remove screen from screen screw. Soak in
gun cleaner or replace if clogged or dirty.
5. Clean screen screw cavity. If any particles
are visible, clean with clean out drills and
flush with gun cleaner.
Refer to FIG. 4 through FIG. 6 for diagrams of
centerline components for all gun models.
1. Flush gun according to Clean Spray Gun
Procedure, page 20.
2. Connect air supply to gun. Set safety stop
to OPEN.
3. Remove air cap.
4. Trigger gun and hold it to relieve pressure
on PCD retainer.
5. Remove PCD retainer by turning it counterclockwise.
6. Remove PCD from mixing module retainer.
To remove PCD that is stuck, set safety
stop to OPEN, depress and release gun
trigger to unseat it. Set safety stop to
CLOSED (SERVICE).
CAUTION
Any material left in cavity on downstream
side of screen will clog mixing module.
6. Inspect screen screw seal for damage.
Replace if necessary.
7. Reinstall screen screw in gun block. Make
sure it is tight.
8. Flush gun with mixing module removed.
22 311321H
7. Remove mixing module retainer.
8. Set safety stop to OPEN. Depress and
release gun trigger to unseat it. Remove
mixing module off end of valving rod. Set
safety stop to CLOSED (SERVICE).
CAUTION
Do not use sharp objects or metal tools to
remove mixing module.
9. Loosen rear packing nut 1-2 turns.
10.Push safety stop partially forward, rotate it
counterclockwise, and slide off air cylinder.
Page 23
Repair
11.Remove valving rod.
Rod Draw Bar
Valving Rod
FIG. 24: Remove Valving Rod
a. Depress trigger lever and hold.
GX-7 DI model only: loosen piston stop
locknut until it disengages from thread
on valving rod.
Rear Stop
residual chemical from metal components.
Use cotton swabs soaked in gun cleaner to
clean plastic components.
16.Coat threads and mating surfaces of gun
block and gun block bracket with Lubriplate
grease, and reassemble.
17.Inspect gun block for damage.
b. Use 5/16 in. nut driver to unthread rod
draw bar and valving rod from rear of
gun.
c. When threads disengage remove
assembly by hand.
12.Inspect valving rod for damage and replace
as required. Clean and remove any buildup
of mixed material from rod using cloth
soaked in gun cleaner or fine steel wool.
If valving rod is replaced, it is recommended to reset forward stop.
13.Disconnect air supply.
14.Remove gun block retaining screw. Carefully slide gun block away from air cylinder.
If dried chemical is built up on gun block,
remove dried chemical before you remove
gun block.
15.Clean all components thoroughly. Use
brushes and clean-out tools to remove
311321H 23
Page 24
Repair
Install Centerline
Components
GX-7 DI Model Only
Before installation, ensure all gun components
are clean and dry. Lubricate all moving parts
and threads.
1. Install rear packing gland with packing
wrench. Tighten onto gun block.
2. Install rear packing retainer loosely.
3. Install valving rod.
a. Connect valving rod to rod draw bar and
insert into air cylinder.
b. Use 5/16 in. nut driver to thread assem-
bly tight into end cap.
GX-7 DI model only: thread rod until
approximately 3/16 in. to 1/4 in.of
thread protrudes from end of piston rod.
4. Thread locknut onto valving rod by hand.
9. With gun trigger depressed, thread mixing
module retainer or PCD body with packing
installed, by hand, and then wrench tighten.
CAUTION
To avoid damage to module and gun block,
do not overtighten mixing module retainer.
10.Release gun trigger.
11.Install PCD over end of mixing module
retainer.
12.Thread PCD retainer onto gun block. Hand
tight.
13.Rotate flat PCD to adjust orientation as
required.
14.Adjust valving rod. See Valving Rod
Adjustment, page 16.
15.Thread air cap into place; hand tight.
16.Slide safety stop onto rear of air cylinder.
Push safety stop partially forward and
rotate clockwise to set to OPEN.
5. Carefully slide gun block onto valving rod
toward air cylinder. Install gun block onto
gun block mounting bracket.
6. Install safety stop; leave in OPEN position.
7. Connect air supply to gun.
8. Depress gun trigger and slide mixing module over end of valving rod.
GX-7 DI model only: ensure valving rod
alignment pin enters alignment slot in gun
block.
Keep gun trigger depressed.
17.Set safety stop to CLOSED (SERVICE).
24 311321H
Page 25
Repair
Replace End Cap and Air
Piston Assembly
End Cap
Spacer
Piston Assembly
Rear
Front U-Cup Seal
FIG. 25: GX-7 DI End Cap and Air Piston
Assembly
Piston
Spring
Socket Head Cap Screw
Cylinder Clamp
GX-7 DI Shown
1. Clean gun according to Clean Spray Gun
Procedure, page 20.
2. Loosen rear packing nut 1-2 turns.
U-Cup
Seal
ensure “cup” faces front of air cylinder
when replacing.
10.By hand, pull piston assembly out of air cylinder and inspect o-ring for damage.
Replace if necessary. Apply Lubriplate
grease prior to installation.
11.If air was escaping around piston rod during operation, replace front u-cup seal or
o-ring. Apply Lubriplate grease and ensure
“cup” faces rear of air cylinder.
12.Insert piston and rod assembly into air cylinder. Take care to not damage front cup
seal as rod passes through.
13.Insert piston spring. (For GX-7 DI models,
also insert piston spacer.)
14.Reinstall end cap into air cylinder.
15.Retighten rear socket head cap screw and
cylinder clamp to handle.
16.Reinstall valving rod. Connect valving rod
to draw bar. Lubricate and thread into end
cap.
3. Push safety stop partially forward, rotate
counterclockwise, and slide safety stop off
air cylinder.
4. Remove valving rod. See Remove Center-
line Components, page 22.
5. Disconnect air supply from gun.
6. Remove rear head cap screw and cylinder
clamp from handle.
7. Remove end cap from air cylinder.
8. Inspect end cap o-ring. Replace if damaged. Install new end cap o-ring after lightly
coating it with Lubriplate grease.
9. Inspect rear U-cup seal or o-ring for damage. Replace if necessary. If removed,
17.Adjust valving rod; see Valving Rod
Adjustment, page 16.
18.Slide safety stop onto rear of air cylinder.
Push safety stop partially forward and
rotate clockwise to set to OPEN.
19.Set safety stop to CLOSED (SERVICE).
20.Tighten rear packing nut.
311321H 25
Page 26
Repair
Replace Trigger Valve
O-Rings
1. Clean gun according to Clean Spray Gun
Procedure, page 20.
2. Disconnect air supply from gun.
Refer to Parts, page 30.
FIG. 26: Replace Trigger Valve O-Ring
3. Remove mounting screw and locknut that
hold trigger in place. Remove trigger.
8. Remove rear internal pipe plug (under pipe
plug).
9. Use pin punch and hammer to gently tap
spring seat until it and valve liner push out
opposite end of hole.
10.Remove 4 o-rings on liner.
11.Apply thick coat of Lubriplate grease to new
o-rings and install.
12.Clean valve hole. Remove any dirt and
debris. Apply thick coat of Lubriplate
grease to inside of valve hole.
13.Slide spring seat into gun handle air valve
hole, tapered end first, until it bottoms out.
14.Push valve liner in as far as it will go. Temporarily screw in valve retainer nut, which
aligns valve liner and valve spool. Remove
valve retainer nut.
15.With valve spool spring in place, insert
valve spool into valve liner. Screw in valve
retainer nut. Do not overtighten.
4. Remove valve retainer nut.
5. Pull out valve spool and valve spring.
Remove old o-rings.
6. Prior to installation, liberally lubricate all
o-rings with lubricant provided in Rebuild
kit.
Follow steps 7-15 to replace o-rings on
valve liner. If o-rings do not need to be
replaced, go to step 16.
7. Remove pipe plug from rear of gun handle.
For guns configured with air inlet at rear of
gun handle, pipe nipple replaces pipe plug.
Remove pipe nipple.
16.Apply small amount of pipe thread sealant
to 1/16 in. pipe plug threads. Screw pipe
plug in place.
17.Apply small amount of pipe thread sealant
to 1/8 in. pipe plug (or 1/8 in. pipe nipple)
and install.
18.Reinstall trigger using screw and locknut.
26 311321H
Page 27
Repair
Clean Mixing Module
1. Flush gun according to Clean Spray Gun
Procedure, page 20.
2. Connect air supply to gun. Set safety stop
to OPEN.
3. Remove air cap by hand.
GX-7A and GX-7 400 Models Only
Air cap and PCD retainer may be difficult
to separate during disassembly due to
overtightening or hardened mixed material.
Use retainer wrench to separate. When
reinstalling, apply lubricant to threads.
mixing module from end of valving rod. Set
safety stop to CLOSED (SERVICE).
9. Inspect valving rod for damage and replace
as required. Use cloth soaked in gun
cleaner or steel wool to clean and remove
buildup of mixed material from rod.
If the valving rod is replaced, reset forward
stop.
10.Clean mixing module.
Ensure cleanout tool size matches module
size used. See the Set-Up Charts on
pages 44 and 46.
a. Insert cleanout tool into pin vise.
FIG. 27: Unthread Cap from PCD Body
4. Trigger gun and hold it to relieve pressure
on PCD retainer.
5. Remove PCD retainer by turning it counterclockwise.
6. Remove PCD from mixing module retainer.
To remove PCD that is stuck, set safety
stop to OPEN, depress and release gun
trigger to unseat it. Set safety stop to
CLOSED (SERVICE).
b. Use cleanout tool to clean module
ports. Take care not to insert tool too far
causing damage to inside bore of module. Use cotton swab soaked in gun
cleaner to clean bore of module.
FIG. 28: Clean Module Ports
7. Remove mixing module retainer.
8. Set safety stop to OPEN. Depress and
release gun trigger to unseat it. Remove
311321H 27
Page 28
Repair
Install Mixing Module
1. Install safety stop; leave in OPEN position.
2. Connect air supply to gun.
3. Depress gun trigger and slide mixing module over end of valving rod.
GX-7 DI model only: ensure valving rod
alignment pin enters alignment slot in gun
block.
Keep gun trigger depressed.
4. With gun trigger depressed, thread mixing
module retainer or PCD body with packing
installed, by hand, and then wrench tighten.
CAUTION
To avoid damage to module and gun block,
do not overtighten mixing module retainer.
11.Slide safety stop onto rear of air cylinder.
Push safety stop partially forward and
rotate clockwise to set to OPEN.
Module
PCD Body
PCD
Note orientation of
fan tip
Front Packing
Air Cap
Retainer O-Ring
PCD Retainer
FIG. 29: Install Mixing Module
5. Release gun trigger.
6. Install PCD over end of mixing module
retainer.
7. Thread PCD retainer onto gun block. Hand
tight.
8. Rotate flat PCD to adjust orientation as
required.
9. Adjust valving rod. See Valving Rod
Adjustment, page 16.
10.Thread air cap into place; hand tight.
28 311321H
Page 29
Clean Pattern Control Disc
1. Set safety stop to CLOSED (SERVICE).
2. Close both manual valves.
3. Turn off air to air cap.
4. Use cotton swab soaked in gun cleaner to
clean external surface of material build up.
Light scrubbing with impinger cleanout
brush may also be required.
a. Trigger gun to SERVICE position and
clean orifice area.
It is not always possible to clean all material build-up from PCD while assembled to
gun. In this case, remove PCD and clean
inside radius of disc.
Repair
GX-7A Model Shown
FIG. 30: Pattern Control Disc (PCD)
311321H 29
Pattern Control
Disc (PCD)
Page 30
Parts
Parts
GX-7A Model Final Assembly
Part Numbers 295542, 295543, 295544, 29545
1
16
17
13
6
7
25
8
22
9
5
11
12
2
!
23
9
24
8
7
21
10
14
20
18
15
30 311321H
19
2, 26
4
3
Page 31
GX-7A Model Final Assembly
Part Numbers 295542, 295543, 295544, 295545
Ref.
No. Part No. Description Qty.
1 295810 Spray gun handle 1
2 15B772 Air hose 1
3 295596 Coupler plug 1
4 295597 Coupler 1
5 296834 R-gun block screen screw
assembly (includes 6, 7, 8, 9)
6 R-gun block screen screw 1
7 296693 Screen screw seal (pack of 2) -
296723 Screen screw seal (pack of 10) -
8 296792 Screen, 80 mesh (pack of 10) -
296724 Screen, 80 mesh (pack of 50) -
9 296722 Check valve assembly
(pack of 10)
10 295384 Gun block 1
11 Module; see GX-7A Mix Mod-
ule Kit, page 43
12 296976 PCD body 1
13 Tip; see Tip Kits, page 48 1
14 296978 Front packing (pack of 5) 1
15 295868 O-ring 1
16 296832 PCD retainer 1
17 296831 Air cap 1
18 296128 Coupling block gasket (pkg 2) 1
19 295433 Coupling block mounting screw 1
296979 Coupling block mounting screw
kit (pack of 2)
20 296833 A-gun block screen screw
assembly (includes 6, 8, 9, 21)
21 A-gun block screen screw 1
22 296828 Rear packing retainer 1
23 296829 Rear seal packing
(pack of 5)
24 296830 Rear seal retainer 1
25 296692 Valving rod 1
26 100030 Fitting 1
1
-
1
-
1
-
Parts
311321H 31
Page 32
Parts
GX-7 DI Model Final Assembly (295541)
5
12
11
19
8
6
7
9
10
14
13
15
18
17
7
6
16
1
32 311321H
3
4
2, 21
Page 33
GX-7 DI Model Final Assembly (295541)
Ref.
No. Part No. Description Qty.
1 295809 Spray gun handle assembly 1
2 15B772 Air hose, 1/4 in. x 23 in. (FXF) 1
3 295596 Coupler plug 1
4 295597 Coupler 1
5 295835 R-screen screw 1
6 296792 Screen, 80 mesh (pack of 10) -
296724 Screen, 80 mesh (pack of 50) -
7 296713 Check valve assembly
(pack of 2)
8 295860 Gun block 1
9 Module; see GX-7 DI Model
Specifications, page 47
10 295837 Module retainer 1
11 Tip; see Tip Kits, page 48 1
12 296865 Tip retainer 1
13 295838 Air cap 1
14 296128 Coupling block gasket
(pack of 2)
15 295433 Coupling block mounting screw 1
296979 Coupling block mounting screw
(pack of 2)
16 295834 A-screen screw 1
17 295836 Rear seal gland 1
18 296864 Rear seal retainer assembly 1
19 296829 Rear seal packing (pack of 5) 20 295383 Coupling block (not shown) 1
21 100030 Fitting 1
2
1
-
-
Parts
311321H 33
Page 34
Parts
GX-7 400 Model Final Assembly (295540)
7
11
12
20
23
21
18
9
19
8
14
6
16
2
!
15
6
9
12
10
5
22
2
13
1, 24
34 311321H
4
3
Page 35
GX-7 400 Model Final Assembly (295540)
Ref.
No. Part No. Description Qty.
1 15B772 Air hose 1
2 296128 Coupling block gasket
(pack of 2)
3 295596 Coupler plug 1
4 295597 Coupler 1
5 295384 Gun block (includes 13) 1
6 296722 Check valve assembly
(pack of 10)
7 295799 Spray gun handle assembly 1
8 296692 Valving rod 2
9 296792 Screen-80, mesh (pack of 10) -
296724 Screen-80, mesh (pack of 50) 10 A-Screen screw 1
11 R-Screen screw 1
12 296693 Screen screw seal (pack of 2) -
296723 Screen screw seal (pack of 10) 13 295433 Coupling block mounting screw 1
296979 Coupling block mounting screw
kit (pack of 2)
14 296828 Rear packing retainer 1
15 296829 Rear seal packing
(pack of 5)
16 296830 Rear seal retainer 1
18 Module; see GX-7 400 Mix
Module Kit, page 45
19 296836 Retainer 1
20 296837 Air cap 1
21 Tip; see Tip Kits, page 48 1
22 296833 A-gun block screen screw
assembly
(includes 6, 9, 10, 12)
23 296834 R-gun block screen screw
assembly
(includes 6, 9, 10, 12)
24 100030 Fitting 1
-
-
-
1
1
-
-
Parts
311321H 35
Page 36
Parts
GX-7A Model Handle Assembly (295810)
6
3
8
27
7
18
9
12 14
2
30
34
19
23
16
36
35
11
28
26
10
24
37
15
4
27
32
17
28
39
42
41
43
38
40
1
21
33
36 311321H
20
27
13
5
Page 37
GX-7 Model Handle Assembly (295810)
Ref.
No. Part No. Description Qty.
1 296862 Spray gun handle 1
2 295678 Cylinder end cap assembly 1
3 295676 Spring 1
4 295675 Air cylinder 1
5 295709 Socket head cap screw,
8-32 x 3/4 in.
6 295680 Two position stop 1
7† 295681 O-ring 1
8 295682 Rod draw bar 1
9† 295683 O-ring 1
10 295663 Cylinder front stop 1
11† 514279 O-ring 1
12 295664 Air piston assembly 1
13 295665 Pipe nipple 1
14 295666 Stop clamp screw 1
15† 295667 Nylon pellet 1
16 295673 Gun block mount 1
17 295677 Air needle valve 1
18 295668 Spring 1
19 295669 Socket head cap screw,
1/4-28 x 5/8
20 295671 Trigger mounting screw 1
21 295688 Valve nut 1
23 295686 Spool valve liner 2
24 295689 Spring seat 1
26❄ 296971 Air valve spring 1
27†❄106555 O-ring, 6
2
1
Parts
† Parts included in Handle Seal Rebuild Kit
296895 (purchase separately).
❄ Parts included in Trigger valve rebuild kit
296897 (purchase separately).
28†❄C20988 O-ring, fluoroelastomer 3
30 295438 Locknut, elastic stop nut,
1
5-40
32† 295405 Needle valve packing 1
33 295692 Spray gun trigger 1
34 295684 Socket head cap screw,
4
10-32 x 1/2
35 295687 Spool valve 1
36† 295674 Gasket 1
37† 295706 O-ring, Neoprene 1
38 295693 Pipe plug, flush seal, 1/6
1
NPT
39 295662 Pipe plug, flush seal, 1/8
1
NPT
40 103656 Hex nipple, 1/8 NPT
1
(optional)
41 295690 Cylinder clamp 1
42 C20003 Socket head cap screw,
1
10-32 x 1/2
43† 295685 O-ring 2
311321H 37
Page 38
Parts
GX-7 DI Model Handle Assembly (295809)
10
9
18
12
2
17
34
11
19
13
20
25
32
14
3
40
15
22
34
29
16
31
30
27
37
8
33
24
38
7
36
39
30
5
4
28
1
21
6
35
38 311321H
23
26
Page 39
GX-7 DI Model Handle Assembly (295809)
Parts
Ref.
No. Part No. Description Qty.
1 296862 Gun handle 1
2 295714 Cylinder end cap assembly 1
3 295715 Air cylinder 1
4 295686 Valve liner 1
5 295687 Valve spool 1
6 295688 Valve retainer nut 1
7 295689 Spring seat 1
8 295690 Cylinder clamp 1
9 295716 Stop, stroke, long 1
10 295717 Two position stop body 1
11 295718 Stroke spacer 1
12 296736 Valving rod holder kit 1
13 295720 Piston spring 1
14 295712 Piston assembly 1
15 295721 Gun block mount 1
16 295713 Air needle valve 1
17 296863 Valving rod, 125 SS 1
18 295676 Spring 1
19† 295681 O-ring 1
20† 295683 O-ring 1
21 295665 Pipe nipple 1
22 295669 Socket head cap screw,
1/4-28 x 5/8
23 295671 Trigger mounting screw 1
24 295431 Locknut 1
25 295722 Flat head cap screw,
10-32 x 1/4 in.
26 295709 Socket head cap screw,
8-32 x 3/4 in.
27 295662 Pipe plug, flush seal, 1/8 in. 1
28❄ 106555 O-ring, fluoroelastomer 4
29† C20988 O-ring, fluoroelastomer 1
30†❄103337 O-ring, fluoroelastomer 3
31 295684 Socket head cap screw,
10-32 x 5/8 in.
32 295438 Stop nut, elastic 1
33† 295685 O-ring 2
34† 295496 U-cup 2
35 295692 Trigger 1
36 295693 Pipe plug, flush seal, 1/16
in.
37 C20003 Socket head cap screw,
10-32 x 1/2
38❄ 295442 Spring 1
39 103656 Hex nipple (optional), 1/8
MPT
40† 103338 O-ring, fluoroelastomer 1
† Parts included in Air Cylinder Rebuild Kit
296895 (purchase separately).
❄ Parts included in Trigger Valve Rebuild Kit
296897 (purchase separately).
1
1
2
4
1
1
1
311321H 39
Page 40
Parts
GX-7 400 Model Handle Assembly (295799)
15
14
17
3
16
25
18
32
21
23
39
24
30
40
3
19
20
29
8
31
28
4
26
5
37
12
7
03)-!8
2
10
11
33
4
35
38
34
6
3
36
9
27
40 311321H
13
22
1
Page 41
GX-7 400 Model Handle Assembly (295799)
Ref.
No. Part No. Description Qty.
1 106245 Cap screw, SCH 2
2 295662 Pipe plug 1
3†❄ 106555 Packing o-ring 6
4†❄ 103337 Packing o-ring 3
5 295684 Socket head cap screw 4
6 295438 Stop nut, elastic, 5-40 1
7†❄ 295685 O-ring 2
8† 295405 Needle valve, packing 1
9 295692 Spray gun trigger 1
10 295693 Pipe plug 1
11 C20003 Socket head cap screw 1
12❄ 295442 Spring 1
13 295695 Button head cap screw 1
14 295676 Spring 1
15 295771 Two-position stop 1
16† 295681 O-ring 1
17 295682 Draw rod bar 1
18† 295683 O-ring 1
19 295663 Front cylinder stop 1
20† 514279 O-ring 1
21 295664 Air piston 1
22 295665 Pipe nipple fitting 1
23 295666 Stop clamp screw 1
24† 295667 Pellet 1
25 295668 Spring 1
26 295669 Socket head cap screw,
modified
27 295671 Trigger mounting screw 1
28 295673 Gun block base 1
29† 295674 Gasket 1
30 295675 Air cylinder 1
31 295677 Air needle valve 1
32 295678 Cylinder end cap 1
33 295690 Cylinder clamp 1
34 295686 Valve liner 1
35 295687 Valve spool 1
36 295688 Retainer valve nut 1
37 295689 Spring seat 1
38 296862 Gun handle 1
39† 295706 O-ring 1
40 295708 Spacer 1
† Parts included in Air Cylinder Rebuild Kit
296895 (purchase separately).
1
Parts
❄ Parts included in Trigger Valve Rebuild Kit
296897(purchase separately).
311321H 41
Page 42
Parts
Coupling Block Assembly (295383)
All models
1
2
5
1
4
Ref.
No. Part No. Description
1 295662 Pipe plug, flush seal, 1/8 in. 2
2 117634 R-swivel fitting 1
3 117635 A-swivel fitting 1
4 295693 Pipe plug, flush seal,
1/16 in.
5 296970 Manual valve assembly 2
6 296215 Coupling block 1
Qty
6
3
.
2
42 311321H
Page 43
Specifications
GX-7A Mix Module Kit
Module Kit†❄ Module Only Cleanout Tool
Specifications
(A) Iso Port
Part No. Size Ref. Part No. Size Ref.
296909 #1 Round 296907 #1 Round 246807 .0320 (.81) 246807 .032 (.81)
296916 #2 Round 296225 #2 Round 246816 .018 (.45) 246816 .018 (.45)
296919 #3 Round 296226 #3 Round 276984 .0225 (.57) 246816 .018 (.45)
296921 #4 Round n/a #4 Round 296290 .035 (.89) 246807 .032 (.81)
296923 #5 Round 296228 #5 Round 276984 .0225 (.57) 248892 .028 (.71)
296925 #7 Flat 296230 #7 Flat 248892 .028 (.71) 248892 .028 (.71)
296906 #10 Flat 296233 #10 Flat 296291 .036 (.91) 296291 .036 (.91)
296910 #12 Flat 296130 #12 Flat 296286 .021 (.53) 296286 .021 (.53)
296915 #16 Round n/a #16 Round 248892 .028 (.71) 248892 .028 (.71)
296917 #22 Round n/a #22 Round 276984 .0225 (.57) 276984 .0225 (.57)
296875 A2 Pour n/a A2 Pour 246816 .018 (.45) 246816 .018 (.45)
296876 A3 Pour n/a A3 Pour 248640 .039 (.99) 248640 .039 (.99)
296868 A5 Pour n/a A5 Pour 246807 .032 (.81) 246807 .032 (.81)
296870 A5-FS Pour n/a A5-FS Pour 246807 .032 (.81) 246807 .032 (.81)
Each module has a specially sized cleanout tool. To
avoid damage to module, use correct cleanout tool.
Part No.
† Module Kits include one mix module and both cleanout tools. See following table.
Diameter
in/(mm)
(R) Resin Port
Part No.
Diameter
in/(mm)
❄ Some Module Kits also available in packs. See following table.
Mix Module Kit
Part No. Size Ref. Qty./Pack
296908 #1 Round 12 (with 2 drills)
296869 A5 Pour 12
296871 A5-FS Pour 12
296872 A10 Pour 12
296873 A20 Pour 12
296874 A2 Pour 12 (with 2 drills)
296911 STD Blank 5
296912 STD Blank 100
296913 PEEK Blank 5
311321H 43
Page 44
Specifications
Set-Up Chart for GX-7A Model
Pres-
sure
(psi)
1000 22 ❄22 296909 (#1) .0320 4 .0320 4 296712
1000 12 ❄12 296919 (#3) .0180 4 .0225 4 296710
1600 16 ❄14 296923 (#5) .0280 4 .0225 4 296710
2000 30 ❄24 296909 (#1) .0320 4 .0320 4 296694
3000 40 ❄24 296921 (#4) .0320 4 .0350 4 296695
600 3.5 N/A 296875 (A2) .0180 1 .0180 1 296697
600 12 N/A 296876 (A3) .0390 1 .0390 1 296697
1000 12 ❖ 16 x 4 296925 (#7) .0280 2 .0280 2
1500 24 ❖ 22 x 4 296906
1500 5 ❖ 16 x 3 296910
Output
(lbs/min)
Pattern
Dia.
(inches)
Module Part
No.
Round Spray Pattern
Fan Spray Pattern
(#10)
(#12)
Polyol
Port
Size
Pour Pattern
.0360 2 .0360 2 296703
.0210 2 .0210 2
No.
Orifices
Iso Port
Size
No.
Orifices Tip
296704
296705
❄ At 24 in. above substrate
❖ At 18 in. above substrate
44 311321H
Page 45
GX-7 400 Mix Module Kit
Module Kits Cleanout Drill
Specifications
Iso Port
Part No. Size Ref. Quantity
296885
296884
296859
296860
296888
296887
296891
296890
402 Round 1
12
451 Fan 1
12
452 Fan 1
12
453 Fan 1
12
CAUTION
Part No.
Each module kit includes cleanout drills. To
avoid damage to module, use correct cleanout drill.
Module Only
Diameter
in/(mm)
246816 .018 (.45) 246816 .018 (.45)
246816 .018 (.45) 246816 .018 (.45)
246631 .020 (.51) 246631 .020 (.51)
296287 .025 (.64) 296287 .0225 (.57)
Polyol Port
Part No.
Diameter
in/(mm)
Part No. Size Ref.
296316 451 Fan
295379 453 Fan
311321H 45
Page 46
Specifications
Set-up Chart for GX-7 400 Model
Pres-
sure
(psi)
1500 3.5 ✖ 8 296885 (402) .0180 1 .0180 1 296858
1500 3.5 ❖ 16 x 3 296859 (451) .0180 1 .0180 1 296853
Output
(lbs/min)
Pattern
Dia.
(inches)
Module Part
No.
Round Spray Pattern
Fan Spray Pattern
Polyol
Port
Size
No.
Orifices
Iso Port
Size
No.
Orifices Tip
1500 4.5 ❖ 16 x 3 296888 (452) .0200 1 .0200 1 296853
1500 8.0 ❖ 16 x 3 296891 (453) .0225 2 .0250 2 296855
✖ At 24 in. above substrate
❖ At 18 in. above substrate
Tip Kits (for GX-7 400 Gun)
Part No. No. Ref. Quantity
296858 40 Round 1
296852 210 Fan 1
296853 212 Fan 1
296854 212 Fan 5
296855 213 Fan 1
296856 213 Fan 5
296857 214 Fan 1
296892 TOM 1
46 311321H
Page 47
GX-7 DI Model Specifications
Module/Tip Data for Chemical Sprayed at 2500 PSI
✖ Module Kit Cleanout Drill Ref. No. ❄Pattern
Fan Spray Pattern
Specifications
❄Output
(lbs/min)
296900 (#2) 246625
(.086 diameter)
296901 (#4) 248892
(.028 diameter)
296903 (#5) 246816
(.018 diameter)
Round Spray Pattern
296903 (#5) 246816
(.018 diameter)
212 12 in. wide 12
206 20 in. wide 22
213 12 in. wide 12
204 20 in. wide 21
212 10 in. wide 8
206 24 in. wide 11
204 18 in. wide 10
212 11 in. wide 4
213 12 in. wide 4
208 8 in. wide 4
40 4 in. diameter 8
55 7 in. diameter 9.5
70 8 in. diameter 9.75
90 10 in. diameter 9.75
❄ Actual results may vary due to chemical system characteristics, temperature, pressure, and
ratio.
✖ Includes appropriate cleanout drills.
Mix Module Kit
Part No. Size Ref. Quantity
296898 PEEK 018/018 1
296899
Module Only
Part No. Size Ref.
296902 #5
311321H 47
PEEK 028/028 1
Page 48
Specifications
Tip Kits
For GX-7A and GX-7 DI Models
Round Tip Kits
Part No. Size Quantity
296708 40 1
296709
296717
296710
296718 70 5
296711
296719
296712 90 1
296720
296694
296714
296695
296696
296697
296877
46 1
55 5
70 1
80 1
80 5
90 5
100 1
100 5
110 1
110 5
125 1
140 1
Flat Tip Kits
Part
No.
296698 202 1
296699
296700
296701
296702 208 1
296703
296704
296715 210 5
296882
296705
296716
296706
296883
296707
No.
Ref. Qty.
203 1
204 1
206 1
209 1
210 1
212.5
SPEC
212 1
212 5
213 1
213-
SPEC
215 1
1
1
Tool Kits
GX-7A and GX-7 DI models: 296835
GX-7 400 model: 296184
48 311321H
Page 49
Technical Data
Category Data
Air Supply 100-125 psi (7.9 bars)
Maximum Operating Pressure 3500 psi (24 MPa, 240 bar)
Maximum Output ❄ GX-7A Model:
40 lbs/min (18 kg/min)
GX-7 DI Model:
22 lbs/min (10 kg/min)
GX-7 400 Model:
8 lbs/min (3.6 kg/min)
Minimum Output ❄ GX-7A Model:
4 lbs/min (1.8 kg/min)
GX-7 DI Model:
4 lbs/min (1.8 kg/min)
GX-7 400 Model:
3.5 lbs/min (1.6 kg/min)
Height 9 in. (23 cm)
Length 9.5 in. (24 cm)
Width 4.5 in. (11 cm)
Weight 3.5 lbs. (1.5 kg)
Mixing GX-7A Model:
Internal impingement, airless atomization,
solvent-free, mechanically self cleaning
GX-7 DI Model:
Internal direct impingement, airless atomization, solvent-free, mechanically self cleaning
GX-7 400 Model:
Internal direct impingement, airless atomization, solvent-free, mechanically self cleaning
Technical Data
❄ Theoretical: actual results will vary with operating conditions
311321H 49
Page 50
Graco Standard Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from
defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special,
extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace
any part of the equipment determined by Graco to be defective. This warranty applies only when the equipment is installed,
operated and maintained in accordance with Graco’s written recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused
by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering,
or substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the
incompatibility of Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper
design, manufacture, installation, operation or maintenance of structures, accessories, equipment or materials not supplied by
Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor
for verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts.
The equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose
any defect in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts,
labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no
other remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or
property, or any other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within
two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS
SOLD BUT NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors,
switches, hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable
assistance in making any claim for breach of these warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying
equipment hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach
of contract, breach of warranty, the negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal
proceedings entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les
parties reconnaissent avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et
procédures judiciaires exécutés, donnés ou intentés, à la suite de ou en rapport, directement ou indirectement, avec les
procédures concernées.
Graco Information
For the latest information about Graco products, visit www.graco.com.
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 311321
International Offices: Belgium, China, Japan, Korea
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441
Copyright 2005, Graco Inc. is registered to ISO 9001
Graco Headquarters: Minneapolis
www.graco.com
Revised 02/2010
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